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metal dusting

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080097
EISBN: 978-1-62708-304-1
... Abstract This chapter discusses the conditions under which carburization and metal dusting occur. It describes the chemical reactions and thermodynamic relationships that drive carburization and metal dusting attack and the factors that determine the amount of damage that metals and alloys...
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Published: 01 December 2008
Fig. 10 Temperature dependence of metal dusting of iron. Source: Ref 18 More
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Published: 01 November 2007
Fig. 5.55 Schematic showing mechanism of metal dusting for iron and low alloy steels with the following steps: (a) The metal is oversaturated with carbon ( a c > 1) due to carbon transfer from a high carbon activity environment ( a c > 1) to the metal, (b) thus resulting More
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Published: 01 November 2007
Fig. 5.57 Mechanism of metal dusting for chromia formers with the following steps: (a) Development of local defects in the oxide scale, allowing carbon transfer from the environment to the metal, (b) carbon ingress into the metal resulting in the formation of stable carbides, M 23 C 6 and M 7 More
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Published: 01 November 2007
Fig. 5.58 Metal dusting attack in alloy 800 in synthesis gas environment at 550 °C (1022 °F). Source: Ref 75 More
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Published: 01 November 2007
Fig. 5.59 Multimet alloy fan box suffering metal dusting attack in a carburizing furnace. (a) General view of failed the sample. Note the perforated edge of the fan box. (b) Cross section of the sample showing pitting attack and severe metal thinning. (c) Severe carburization attack beneath More
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Published: 01 November 2007
Fig. 5.60 Oxide scale and no evidence of metal dusting on the surface of a Multimet alloy fan box exposed to flowing carburizing gas (same fan box as that shown in Fig. 5.59 ). The sample was plated with nickel before mounting for metallographic examination. More
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Published: 01 November 2007
Fig. 5.61 Type 310SS furnace component suffering metal dusting in a furnace used for manufacturing carbon fibers. (a) General view of the failed component. (b) Cross section of the sample showing pitting and thinning More
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Published: 01 November 2007
Fig. 5.65 Effect of grain size on the metal dusting behavior of Type 304SS tested at 600 °C (1112 °F) in H 2 -24CO-2H 2 O. Source: Ref 91 More
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Published: 01 November 2007
Fig. 5.66 Metal dusting resistance of several Fe-Ni-Cr alloys and Ni-base alloys tested in H 2 -90%CO for 672 days at 482, 566, 649, and 732 °C (900, 1050, 1200, and 1350 °F). The alloys tested were Type 304 (S30403), Type 310 (S31000), alloy 85H (S30615), alloy 800H (N08810), alloy 601 More
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Published: 01 November 2007
Fig. 5.68 Metal dusting resistance of Fe-Ni-Cr alloys (800H and HP40) in comparison with Ni-base alloy 600H tested at 650 °C (1200 °F) in H 2 -24CO-2H 2 O ( a c = 14). Source: Ref 94 More
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Published: 01 November 2007
Fig. 5.69 Increasing Cr along with addition of aluminum improves the metal dusting resistance of the alloy in Ni-Cr-Fe alloys. Source: Ref 94 More
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Published: 01 November 2007
Fig. 5.70 Metal dusting behavior of various Ni-base alloys tested at 593 °C (1100 °F) in H 2 -18.4CO-5.7CO 2 -22.5H 2 O at 14.3 atm of pressure. Source: Ref 95 More
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Published: 01 November 2007
Fig. 5.79 Metal dusting behavior at 650 °C (1200 °F) in H 2 -49CO-2H 2 O for alloy 601 in three different surface conditions: as-ground surface, elecropolished surface, and black-annealed surface. Source: Ref 94 More
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Published: 01 November 2007
Fig. 5.80 Metal dusting behavior in terms of weight change tested at 621 °C (1150 °F) in H 2 -80CO for alloy 601 in various surface conditions. Source: Ref 98 More
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Published: 01 November 2007
Fig. 5.81 Metal dusting behavior in terms of weight loss rate tested at 621 °C (1150 °F) in H 2 -80CO for alloy 601 in various surface conditions. Source: Ref 98 More
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Published: 01 November 2007
Fig. 5.82 Effect of H 2 S on metal dusting behavior of iron at 500 °C (932 °F) in H 2 -CO-H 2 O-H 2 S gas mixture ( a c = 100). Source: Ref 103 More
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Published: 01 November 2007
Fig. 5.83 Effect of H 2 S on metal dusting behavior of iron at 700 °C (1292 °F) in H 2 -CH 4 -H 2 S gas mixture ( a c = 100). Source: Ref 104 More
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Published: 01 November 2007
Fig. 5.84 Effect of H 2 S on metal dusting behavior of iron in terms of p H 2 S/ p H 2 versus 1/ T . Open data points represent that the onset of metal dusting was retarded for more than 48 h, while the solid data points represent metal dusting without retardation. The hatched region More
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Published: 01 November 2007
Fig. 5.67 Effects of Al, Si, Nb, Mo, and W additions to a model alloy (alloy 800, Fe-20Cr-32Ni) on the metal dusting behavior of modified experimental alloys. Source: Ref 93 More